[PATCH 5.18 0607/1095] iio: adc: max1027: Fix alignment for DMA safety

[Greg Kroah-Hartman]

From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>

[ Upstream commit e754fb7e7a05e3838c9aa044b4114869dd0d1e17 ]

____cacheline_aligned is an insufficient guarantee for non-coherent DMA
on platforms with 128 byte cachelines above L1.  Switch to the updated
IIO_DMA_MINALIGN definition.

Fixes: fc167f624833 ("iio: add support of the max1027")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Acked-by: Nuno Sá <nuno.sa@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220508175712.647246-24-jic23@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/iio/adc/max1027.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c
index 4daf1d576c4e..b725d012625c 100644
--- a/drivers/iio/adc/max1027.c
+++ b/drivers/iio/adc/max1027.c
@@ -272,7 +272,7 @@ struct max1027_state {
 	struct mutex			lock;
 	struct completion		complete;
 
-	u8				reg ____cacheline_aligned;
+	u8				reg __aligned(IIO_DMA_MINALIGN);
 };
 
 static int max1027_wait_eoc(struct iio_dev *indio_dev)
-- 
2.35.1